Rotor, motor, compressor, air conditioner and vehicle

Abstract

The invention provides a rotor, a motor, a compressor, an air conditioner and a vehicle. The rotor comprises: a rotor core, wherein the rotor core is provided with a plurality of magnet grooves, and the distance from the outer contour line of the rotor core to the geometric center of the rotor core is L1; and permanent magnets arranged in the magnet grooves, wherein the sum of the widths of all the permanent magnets corresponding to a single magnetic pole is bm, the thickness of each permanent magnet in the magnetization direction is hm, the ratio of the length of the outer contour line corresponding to the single magnetic pole to the bm is smaller than or equal to 1.18 and larger than or equal to 1, and the ratio of L1 to hm is less than or equal to 15 and greater than or equal to 10. According to the rotor provided by the invention, the utilization rate of the permanent magnets is improved to the maximum extent, the rotor can be magnetized in a saturated manner and has relatively high demagnetization resistance, and high power density and motor miniaturization of the motor are realized.

Description

technical field [0001] The present invention relates to the technical field of motors, in particular to a rotor, a motor, a compressor, an air conditioner and a vehicle. Background technique [0002] In related technologies, the permanent magnets of the rotor of the variable frequency permanent magnet synchronous motor are arranged in a "one" shape, so that the amount of permanent magnets is limited and the magnetic load cannot be further increased. Although the permanent magnet of the motor rotor adopts a "V" or "U" shape to increase the magnetic load, the amount and thickness of the permanent magnet are unreasonable. If the rotor does not have a magnetic assembly, the rotor cannot be saturated and magnetized, resulting in permanent The utilization rate of the magnet is reduced, and the reliability of the motor against demagnetization is reduced, and there is a risk of demagnetization; if the rotor is assembled with magnetism, it will absorb iron filings, which cannot meet ...

AI Technical Summary

Problems solved by technology

[0002] In related technologies, the permanent magnets of the rotor of the variable frequency permanent magnet synchronous motor are arranged in a "one" shape, so that the amount of permanent magnets is limited, and the magnetic load cannot be further increased.

Although the permanent magnet of the motor rotor adopts a "V" or "U" shape to increase the magnetic load, the amount and thickness of the permanent magnet are unreasonable. If the rotor does not have a magnetic assembly, the rotor cannot be saturated and magnetized, resulting in permanent The utilization rate of the magnet is reduced, and the reliability of the anti-demagnetization of the motor is reduced, and there is a risk of demagnetization; if the rotor is assembled with magnetism, it will absorb iron filings, which cannot meet the production requirements of no iron filings and the product requirements of no iron filings inside the compressor

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